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Author Topic: Graupner Bremen 9 ,my first kit build and help is appreciated  (Read 13479 times)

fastvee

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #25 on: July 07, 2012, 09:50:20 AM »

Thanks, yeah, hobbypeople has strange pricing(or price tagging)... -been at their shop few times, nice tiny rc shop, but their web shop is a bit difficult to follow at times.

Just checked what cornwallmodelboats has and they have many different railings for about a pound a piece, so I may just order from there when it is time to do the rails.

I am thinking of building the boat first and then think what railings are nice fit to the rest of the boat looks.

Yesterday I got the Futaba 3001 servo for steering ,and made the servo mount(not included in kit)




Just got back from the paint shop:

really dark blue(for hull) acrylic paint

Clear varnish for that blue and for wood -also acrylic.

Gray primer (for all the parts that are painted and plywood parts)  -also using that for the deck,(or that matte white) not going for that steel deck look, just after that gray(or white) gelcoat look that some boats have.  -it will be cleared over also(not if matte white).


Matte white for the cabin ( not sure what paint it is, not acrylic, but it says on the can that it suits most plastics).

Why white on the allready white cabin? -the damn shiny abs toy like look must be covered....


I am still thinking about the antifouling color, white or black, not red cause all the bremen 9s are that color.

thinking of something like the Finnish aquador boats color chemes.

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fastvee

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #26 on: July 08, 2012, 03:05:11 PM »

Started with the build today.

The instructions are good, but not perfect. So far I had to guesstimate how deep the rudder bushings should go,glued them almost flush with the bottom, just a bit through the hull so the o-rings on the rudder shafts fits nicely.

Will update as something new happens, so far Im at here:





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fastvee

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #27 on: July 08, 2012, 07:21:28 PM »

Now finishing the motor mount/bulkhead.

Some reason Graupner wants me to use 2.2x9.5mm self tapping screws to hold the plastic motor mounts on the wood. Great, -if the motor mount wouldnt be 9mm thick..

So I drilled the mounting holes a bit bigger and use 4x25mm screws now..(and they go through the 10mm wood frame so it is strong now).

I will also glass the whole bulkhead -to widhtstand possible brushless upgrade later . I will countinue the build in few days.

Thats all for today,

-Pate
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fastvee

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #28 on: July 13, 2012, 04:02:48 PM »

Continued with the build today.

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fastvee

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #29 on: July 13, 2012, 05:17:58 PM »

Did the watercooling stuff out of the way, and test fitted the electronics
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fastvee

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #30 on: July 13, 2012, 06:44:01 PM »

Wiring done.
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john44

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #31 on: July 13, 2012, 09:10:28 PM »


I will also glass the whole bulkhead -to widhtstand possible brushless upgrade later . I will countinue the build in few days.

Be carefull  on ABS hull,s fiberglass gets hot when curing and could ruin your hull.

john
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Stavros

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #32 on: July 13, 2012, 09:13:58 PM »

Be carefull  on ABS hull,s fiberglass gets hot when curing and could ruin your hull.

john

John your point being I am intrigued as you have quoted and not commented


Dave
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john44

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #33 on: July 13, 2012, 09:25:37 PM »

Hi Stavros, the reason for my post was because a friend of mine decided to fix his battery box
in his styrene hull, using fiberglass resin.
He poured it in to a level that the tray would sit on placed the tray in position and left the boat on its
stand to dry. He came back later to find the hull had a bow in it where it must have got too hot
during curing to sustain the hulls integrity.
He was left with a useless hull which went in the bin.

john
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fastvee

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #34 on: July 13, 2012, 09:28:38 PM »

Be carefull  on ABS hull,s fiberglass gets hot when curing and could ruin your hull.

john

good call, but I will only glass the wood parts, not the hull.  Curing temp also differs, some use too much hardener and the mixture can start to boil!  

And for all   not  used of glassing abs, here is a tip: the cloth only bonds well enough to widthstand fe use(flips and dunks)  if ca is used to attach the cloth to the hull, and then light coat of resin added.

I know fast electric builders use this ca trick on abs race hulls.

Pate
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Stavros

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #35 on: July 13, 2012, 09:45:18 PM »

Hi John yes i fully agree with you in what you have said,when I posted what I did your ans wasnt there thats why I asked


Dave
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fastvee

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #36 on: July 15, 2012, 06:39:23 PM »

Yesterday I got the deck glued on using slow cure epoxy. Sadly not 100% ,but another coat of glue(this time used  stabilit) added to the seam.  There is slight warping of the deck in some areas, will block sand it a bit but wont use filler, will see how it will turn out.

I filled the anchor hole on hull, will be using another method to hold/use  anchor on this boat(at the rear)

I also tested the boat in my tiny test tank(gulf of Finland), watercooling works and no leaks. Speed is lacking of this boat(and it is still just half of a boat, so more weight will slow it even more) , but I guess a bit better props will solve that.

Tomorrow I will sand the deck flush with the hull and then I need to fill the little gabs on the seam that sanding will reveal. -and that takes me to the next question:

-What filler should I use? -wont use any car stuff here, cause the abs will not hold automotive fillers well.(Atleas the styrene(abs sheet) I have used before has never liked fillers)

Thinking of using epoxy or stabilit express to do that job -if the gab is not too big to fill with thin stuff.

And when it is time to do the fenders/other abs parts I guess best way of filling abs seams is... -abs? -thinking of using acetone to melt scrap styrene/abs and use that as a filler?

Any thoughts?


-Pate
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essex2visuvesi

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #37 on: July 15, 2012, 06:56:24 PM »

revel plasto works well on plastics... I use it a lot on plastic kits
Easy to find in Finland too
http://www.pienoismallitukku.fi/PublishedService?file=page&pageID=9&itemcode=REV39607

The tamiya stuff is good as well but expensive

If you dont mind waiting for delivery from the UK the squadron white putty is in my opinion by far the best
http://www.cornwallmodelboats.co.uk/acatalog/fillers.html

If you want to try some of the squadron stuff let me know and ill post you a tube (have several :) )
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fastvee

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #38 on: July 15, 2012, 07:19:38 PM »

Hi , that sound just the right stuff, you got pm.


thanks,

-Pate
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fastvee

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #39 on: July 18, 2012, 06:29:13 PM »

Now the deck is sanded flush with the hull and will be painted next weekend.

Just need to fill few spots and it is ready for paint.

The deck is still not 100% straight(one or two "waves" appeared after the glue dried), but it should not look that bad after a gray or white paint.

Will update with pictures tomorrow or friday.

-Pate
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fastvee

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #40 on: July 19, 2012, 02:04:35 PM »

Today I bought 3 meters of 2mm brass tubing.

Here it is after some cutting,bending and soldering.

My first time doing this brass soldering thing, but Im happy with the end result.

The railings will be painted with chrome air brush stuff  soon.

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maffen

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #41 on: July 20, 2012, 11:06:48 AM »

hi fastfee, for so far i can see is your motor watercooling layout totaly wrong,your intake must be behind (in the wake) of your prop(s) and  (as i do it) your outtake(s) above the waterline
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roycv

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #42 on: July 20, 2012, 11:21:34 AM »

Hi fastvee you have a PM.
Roy
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essex2visuvesi

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #43 on: July 20, 2012, 11:47:49 AM »

hi fastfee, for so far i can see is your motor watercooling layout totaly wrong,your intake must be behind (in the wake) of your prop(s) and  (as i do it) your outtake(s) above the waterline

I think the pickup/outlet is one of these so only has to be somewhere where there is water movement... water is forced in and also pulled out


I have one fitted to my sons white star and Robbe katja.  They are quite effective with very little drag
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fastvee

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #44 on: July 20, 2012, 12:49:35 PM »

Hi, essex2visuvesi is correct.

I have used these for many years and even at slow speed the water flow is good.

No need for propwash pickups etc.

Gundert pickup works well even at slow speeds.

I use 2 of these, one per motor.

-Pate
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roycv

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #45 on: July 20, 2012, 01:40:41 PM »

Hi fastvee, I learn something every day, not come across Gundert pick ups before.  I tend to cut scoops etc from common plastic section.
regards Roy
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essex2visuvesi

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #46 on: July 20, 2012, 08:19:15 PM »

another advantage of this style pickup is that they work in both directions
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fastvee

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #47 on: July 27, 2012, 03:43:53 PM »

Got primer, this will be the antifouling color also.

The deck is allready painted gray and cleared.

Notice the water pick ups
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fastvee

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #48 on: July 27, 2012, 04:00:20 PM »

Sides painted and the whole hull cleared.

after that the hull has been wet sanded 2000grit and wil be polished tomorrow.

Few dust and insect marks are present but that is what happens when painting stuff outdoors...

Still thinking do I paint the rubbing strakes satin black(rubber look), or leave them blue...

-Pate
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fastvee

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Re: Graupner Bremen 9 ,my first kit build and help is appreciated
« Reply #49 on: July 27, 2012, 07:36:54 PM »

Just ordered handed pair of 1315/3 brass propellers from Prop-Shop.(they recomenned these 32mm 3 bladed props  for my motors/ use)  Great service once again from Lucy and Simon!

(Cant wait to see the props, last 5517/3 stainless ones I got from them for my waverider navaho are so nice....)

-Pate



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